Berthold Stoeger b5c8d0dbb4 statistics: fix range in categorical axes
The range for a one-bin chart is [-0.5,0.5], thus the range
in an n-bin chart is [-0.5,n-0.5], not [-0.5,n+0.5].

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2021-01-09 14:25:02 -08:00
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